EP4 Sonic Defenders® Plus protect your hearing without interfering with your ability to hear routine sounds or conversations. Their triple-flange stem design fits larger ear canals and provides a Noise Reduction Rating (NRR) of 19dB.

zSordin's slim cup and headband design allows the headset to be worn under ballistic helmets. The digital electronic design of the zSordin is controlled by a micro-processor. This makes it possible to combine very low current consumption with high performance. Clear, natural stereo sound reproduction from the zSordin.